Environment
Posen Elem School — Environment & Air Quality
Air quality, drinking-water safety and environmental hazards within 1–5 miles of Posen Elem School in Posen, Illinois.
Latest Air Quality Index
38
Good · monitor 6.0 km away
PM2.5 annual6.9 µg/m³
Water health violations 10yr0
TRI sites within 1 mi2
Air Quality
EPA AirNow + AQS · 2024
38
AQI latest — Good
38
AQI 7-day avg
0
Days unhealthy in last 90
6.9
PM2.5 annual µg/m³ (EPA NAAQS limit: 9.0)
50.8
Ozone annual ppb
29.0
NO₂ annual ppb
Public Water System
POSEN · PWS IL0312520
0
Health-based violations (10yr)
0
Acute violations (10yr)
5,331
Population served
4H
Most recent violation type
2025-07-02
Nearby Environmental Hazards
EPA Superfund (NPL), TRI release sites, brownfields (2024)
2
TRI sites within 1 mile
93
TRI sites within 5 miles
7.1 mi
Nearest Superfund (NPL)
LAKE CALUMET CLUSTER
0.6 mi
Nearest brownfield
X TREME AUTO SALES
Sources: school_air_quality + school_air_quality_daily (EPA AQS / AirNow), school_water_safety (EPA SDWIS), school_env_hazards (EPA NPL / TRI / Brownfields).